CAS 10034-99-8PubChem CID 24843
Magnesium Sulfate Heptahydrate
- IUPAC name
- magnesium;sulfate;heptahydrate
- Molecular formula
- H14MgO11S
- Molecular weight
- 246.48 g/mol
- Exact mass
- 246.0107241 Da
- Topological polar surface area
- 95.6 Ų
- Hydrogen-bond donors
- 7
- Hydrogen-bond acceptors
- 11
- Covalent units
- 9
- Defined stereocentres
- 0
Also known as
Epsom saltmagnesium sulphate heptahydrateMagnesia sulphuricaMagnesium sulfate (1:1) heptahydrateEpsom salt(heptahydrate)Bitter saltSulfuric acid magnesium salt (1:1), heptahydrateSK47B8698T
16 more reported names
Magnesii sulfatis heptahydrasCHEBI:31795Magnesium Sulfate, HeptahydrateTheraworx ReliefHumco Epson SaltCVS muscle reliefRelief Epsom SaltNuValu Epsom SaltAssured Epsom SaltEpsom Salts ReliefRapidol Sal InglesaPHUELDaily Care Epsom SaltRefChem:5974MAGNESIUM SALFATECVS foaming muscle relief
External database identifiers
- ChEBI:CHEBI:31795
- ChEMBL:CHEMBL3989857
- EPA DTXSID:DTXSID5040544
Evidence from additional scientific databases
EMBL-EBI ChEBI
Exact identifier matchCHEBI:31795
magnesium sulfate heptahydrate
A hydrate that is the heptahydrate form of magnesium sulfate.
- Formula
- 7H2O.Mg.O4S
- Average mass
- 246.473 g/mol
- Monoisotopic mass
- 246.01072 Da
- Formal charge
- 0
- hydrate — is a (CHEBI:35505)
- magnesium salt — is a (CHEBI:33975)
- laxative — has role (CHEBI:50503)
- cathartic — has role (CHEBI:75325)
- magnesium sulfate — has part (CHEBI:32599)
- laxative — has role (CHEBI:50503)
- cathartic — has role (CHEBI:75325)
- hydrate — is a (CHEBI:35505)
- magnesium salt — is a (CHEBI:33975)
Additional curated names
magnesium sulfate--water (1/7)bitter saltepsomiteepsom saltmagnesium sulfate (1:1) heptahydratemagnesium sulfate heptahydrateMagnesium sulfate heptahydratemagnesium sulphate heptahydrateMgSO4.7H2Osulfuric acid magnesium salt heptahydrate
Cross-references from this source
- CAS: 10034-99-8 — NIST Chemistry WebBook
- CAS: 10034-99-8 — ChemIDplus
- MANUAL_X_REF: C12505 — KEGG COMPOUND
- MANUAL_X_REF: CPD0-2387 — MetaCyc
- MANUAL_X_REF: D01108 — KEGG DRUG
- MANUAL_X_REF: DBSALT001240 — DrugBank
- MANUAL_X_REF: Epsomite — Wikipedia
- MANUAL_X_REF: FDB015432 — FooDB
Mapped by: Exact CAS cross-reference in the ChEBI compound record. Source updated: 2020-04-24. Retrieved: 2026-08-31. Open source record
NIH PubChem PUG-View
Exact identifier match24843
Attributed physical-property, hazard, environmental and use annotations.
- Density: 1.68 @25 °C Source: PAC Chemical Database, U.S. Department of Energy
- Physical Description: Liquid; Large Crystals; Dry Powder Source: EPA Chemical Data Reporting (CDR)
- Note: This chemical does not meet GHS hazard criteria for 100% (424 of 424) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 424 of 424 companies. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 424 reports by companies from 2 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 424 of 424 reports by companies.; There are 0 notifications provided by 0 of 424 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Note: This chemical does not meet GHS hazard criteria for 100% (2 of 2) of all reports. Source: European Chemicals Agency (ECHA)
- GHS Hazard Statements: Not Classified; Reported as not meeting GHS hazard criteria by 2 of 2 companies. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- ECHA C&L Notifications Summary: Aggregated GHS information provided per 2 reports by companies from 1 notifications to the ECHA C&L Inventory.; Reported as not meeting GHS hazard criteria per 2 of 2 reports by companies.; There are 0 notifications provided by 0 of 2 reports by companies with hazard statement code(s).; Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. Source: European Chemicals Agency (ECHA)
- Consumer Uses: Soil amendments (fertilizers); Not Known or Reasonably Ascertainable; Flocculating agent Source: EPA Chemical Data Reporting (CDR)
- Industry Uses: Flocculating agent; Not Known or Reasonably Ascertainable; Soil amendments (fertilizers); Emulsifier Source: EPA Chemical Data Reporting (CDR)
Mapped by: Existing checksum-valid CAS to unique PubChem CID match. Retrieved: 2026-08-31. Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|---|---|
| EMBL-EBI ChEBI | Exact match | 2026-08-31 |
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.